Gonzalez, who is unemployed and previously volunteered at Comic-Con, was arrested in Temecula, Mack said.

Smith, an art student and a former member of the U.S. Army Reserve, was arrested at his house in San Diego. Investigators believe he has several victims, she said.

The 17-year-old was arrested at his San Diego home. He has been charged with possession of child pornography, Mack said. The images found on his computer were “particularly disturbing” and included very young children, she said.

At least two of the 61 victims are from San Diego, Mack said. Most are 13 to 15 years old.

Thirty-nine of those arrested are from California, including John David Boyle, 49, a former middle schoolteacher from Glendora, in east Los Angeles County. He was taken into custody in his classroom after he allegedly asked an undercover investigator to engage in sexual activity while watching pornography featuring young boys.

Officials said other significant arrests included Jimmy Caraballo-Colon, 25, of Puerto Rico and Eduardo Arturo Romero Barrios, 33, of Mexico, both of whom have several alleged victims around the world.

The operation also serves as a reminder to parents to be aware of their children’s online activity, especially during the summer when most schools are not in session, Mack said.

Anyone with information about potential victims is encouraged to call Homeland Security Investigations at (866) 347-2423.